They have called me twice and left a message to return their call. Man with heavy accent told me he was calling from Washington DC regarding the lawsuit the IRS has filed against me...which does not exist. I told him I knew this was a scam and he hung up on me.
We received a voice mail today at our home saying, in an automated voice, "The IRS is filing suit against you. Call the department at 206-201-2542. Thank you." Searched Google before calling and glad we did. Thanks to all prior posters for warning all of us.